First beam extraction from a superconducting azimuthally varying field cyclotron for proton therapy

被引：2

作者：

Ebara, Y. ^{[1
]}

Tsutsui, H. ^{[1
]}

Nakajima, S. ^{[1
]}

Hara, S. ^{[1
]}

Nomura, S. ^{[1
]}

Suga, K. ^{[1
]}

Yoshida, J. ^{[1
]}

Taki, K. ^{[1
]}

Murata, H. ^{[1
]}

Takahashi, N. ^{[1
]}

Hashimoto, A. ^{[1
]}

Sakemi, T. ^{[1
]}

Kamiguchi, N. ^{[1
]}

Arakawa, Y. ^{[1
]}

Morie, T. ^{[1
]}

Hirayama, T. ^{[1
]}

Oda, H. ^{[1
]}

Fujita, S. ^{[1
]}

Kanakura, J. ^{[1
]}

Mikami, Y. ^{[1
]}

Tsurudome, T. ^{[1
]}

Miyashita, T. ^{[1
]}

Kumata, Y. ^{[1
]}

机构：

[1] Sumitomo Heavy Ind Ltd, ThinkPark Tower, 1-1 Osaki 2 Chome,Shinagawa Ku, Tokyo 1416025, Japan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2023年 / 1056卷

关键词：

Proton therapy accelerator; AVF cyclotron; Superconducting cyclotron;

D O I：

10.1016/j.nima.2023.168629

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A 230 MeV superconducting azimuthally varying field (AVF) cyclotron SC230 was developed by Sumitomo Heavy Industries Ltd., Japan. With a yoke diameter, height and weight of 2.8 m, 1.7 m and 65 t, respectively, it is currently the most compact isochronous cyclotron for proton therapy. Size reduction was achieved by a high magnetic field using cryogen-free superconducting coils. It adopts not only a superconducting magnet, but also sectors with a narrow pole gap and large spiral angle, two dees with low power consumption, and beam extraction using the precessional extraction method. It has a maximum beam current of 1 & mu;A. The total power consumption of its system is lower than 200 kW. After each component, including the magnet, was fabricated, the cyclotron was moved to a new test site, and a vacuum test and conditioning of some components were conducted. The beam commissioning started, and the first extracted beam was successfully observed. In this paper, the processes and results of the beam commissioning and the basic performance of the first beam are reported.

引用

页数：10

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